Capacitor and method for manufacturing capacitor

Abstract

A capacitor includes a bus bar. The bus bar includes a bus bar body member and a terminal formation member configured to be superposed on and fixed to a terminal formation part of the bus bar body member. In the terminal formation part, a plurality of first connection terminal parts are formed so as to be arranged in one direction, by portions of the terminal formation part being cut and raised. In the terminal formation member, a plurality of second connection terminal parts are formed so as to be arranged in one direction, by portions of the terminal formation member being cut and raised, and second openings are formed in places where the portions have been cut and raised. The first connection terminal parts and the second connection terminal parts are alternately arranged in one direction, by the first connection terminal parts being passed through the second openings.

What is claimed is: 
     
       1. A capacitor comprising:
 a capacitor element; and 
 a bus bar configured to be connected to an electrode of the capacitor element, wherein 
 the bus bar includes 
 a bus bar body member having a terminal formation part and an electrode terminal part configured to be connected to the electrode, and 
 a terminal formation member formed separately from the bus bar body member and configured to be superposed on and fixed to the terminal formation part, 
 in the terminal formation part, a plurality of first connection terminal parts protruding from a surface of the terminal formation part and configured to be connected to external terminals are formed so as to be arranged in one direction, by portions of the terminal formation part being cut and raised, and first openings are formed in places where the portions have been cut and raised, 
 in the terminal formation member, a plurality of second connection terminal parts protruding from a surface of the terminal formation member and configured to be connected to external terminals are formed so as to be arranged in one direction, by portions of the terminal formation member being cut and raised, and second openings are formed in places where the portions have been cut and raised, and 
 the first connection terminal parts and the second connection terminal parts are alternately arranged in one direction, by the first connection terminal parts being passed through the second openings, or by the second connection terminal parts being passed through the first openings, 
 wherein, in the terminal formation member, a frame part surrounding the second openings is provided with, at a predetermined interval, a plurality of joining points at which the terminal formation member is joined to the terminal formation part by welding, and 
 wherein the frame part is provided with, between adjacent two of the joining points, a narrow width portion having a width smaller than that of a portion where each joining point is provided. 
 
     
     
       2. A capacitor comprising:
 a capacitor element; and 
 a bus bar configured to be connected to an electrode of the capacitor element, wherein 
 the bus bar includes 
 a bus bar body member having a terminal formation part and an electrode terminal part configured to be connected to the electrode, and 
 a terminal formation member configured to be superposed on the terminal formation part and fixed thereto by welding, 
 in the terminal formation part, a plurality of first connection terminal parts protruding from a surface of the terminal formation part and configured to be connected to external terminals are formed so as to be arranged in one direction, by portions of the terminal formation part being cut and raised, and first openings are formed in places where the portions have been cut and raised, 
 in the terminal formation member, a plurality of second connection terminal parts protruding from a surface of the terminal formation member and configured to be connected to external terminals are formed so as to be arranged in one direction, by portions of the terminal formation member being cut and raised, and second openings are formed in places where the portions have been cut and raised, 
 the first connection terminal parts and the second connection terminal parts are alternately arranged in one direction, by the first connection terminal parts being passed through the second openings, or by the second connection terminal parts being passed through the first openings, 
 in the bus bar, a plurality of joining points for joining the terminal formation part and the terminal formation member together by welding are provided on the electrode terminal part side with respect to the first openings and the second openings, and 
 in the bus bar body member, third openings are formed in vicinities of the joining points and on the electrode terminal part side with respect to the joining points. 
 
     
     
       3. The capacitor according to  claim 2 , wherein
 the third openings are formed so as to overlap the joining points in a direction orthogonal to a direction in which the joining points are arranged. 
 
     
     
       4. The capacitor according to  claim 2 , wherein
 in the terminal formation member, a frame part surrounding the second openings is provided with, at a predetermined interval, a plurality of the joining points, and 
 the frame part is provided with, between adjacent two of the joining points, a narrow width portion having a width smaller than that of a portion where each joining point is provided.